A proforma invoice is a preliminary bill sent by a seller to a buyer before a sale is finalized. It is not a demand for payment. It is not legally binding. Think of it as a formal preview of what the final invoice will look like — sent early so both parties can agree on the terms before anything ships or gets delivered.

If you have ever imported goods, exported products, or worked with large corporate clients, you have almost certainly received or issued one. Yet most business owners still confuse it with a quotation, a purchase order, or even a tax invoice. This guide clears all of that up — and shows you exactly when and how to use one.

What Is a Proforma Invoice?

A proforma invoice is a document issued by a seller that outlines the estimated cost, quantity, description, and terms of goods or services before the transaction is complete.

What it is:

• A formal price commitment in invoice format
• A pre-sale agreement document
• A tool for customs, financing, and internal approvals

What it is not:

• A legally binding payment demand
• A tax invoice (you cannot claim GST/VAT input credit on it)
• A replacement for a commercial invoice at customs

The word "proforma" comes from Latin and means "as a matter of form." That captures it well — it follows the form of an invoice but carries none of the legal weight of a final bill.

Why Do Businesses Use a Proforma Invoice?

There are four main reasons a seller sends a proforma invoice:

1. International Trade and Customs

Customs authorities in most countries need documentation before a shipment arrives. A proforma invoice gives border officials the product descriptions, quantities, values, and country of origin they need to estimate import duties and begin pre-clearance paperwork — even before the actual goods leave port.

2. Letters of Credit (LC)

When a buyer needs bank financing to complete a large purchase, the bank requires a document that spells out the exact transaction value and terms. A proforma invoice is the document banks use to open a Letter of Credit (LC). Without it, the buyer simply cannot start the LC process. The Reserve Bank of India's FEMA guidelines govern how such documents are treated in cross-border transactions.

3. Internal Purchase Approvals

Government agencies, large corporations, and institutions often require a formal document before approving a purchase order. A proforma invoice gives procurement teams and finance departments the numbers they need to get sign-off before committing to the deal.

4. Advance Payments

When a seller needs upfront payment before starting production or shipping, they send a proforma invoice requesting the advance. It serves as the formal basis for that payment — not a tax invoice, but a clear record of what was agreed.

Real-World Example: How a Wrong Proforma Invoice 

Cost an Indian Exporter ₹1.8 Lakhs

Rajesh Sharma runs a handicraft export business from Jaipur. In March 2024, he sent a shipment of handmade carpets worth ₹12 lakhs to a buyer in Germany.

His proforma invoice had two mistakes:

• HSN code was written as 5702 instead of 57021000
• Incoterms were missing (he forgot to write CIF/FOB)

What happened next:

• German customs held the shipment for 11 days
• Buyer had to pay €800 extra in customs storage fees
• Buyer deducted this from final payment
• Rajesh lost ₹1.8 lakhs on a single shipment

The fix was simple. One correct proforma invoice would have saved everything. This is why every field in a proforma invoice matters.

Proforma Invoice vs Commercial Invoice vs Quotation vs Purchase Order

Key Takeaway: Proforma comes first in every transaction. Commercial invoice closes it.

Proforma Invoice vs. Quotation vs. Purchase Order

Three documents, three very different roles. Here is how they fit in the sales process:

Quotation — The seller's initial offer. Informal, often just a price list or email. No standard format required.

Proforma Invoice — The seller's formal offer, presented in invoice format. More detailed than a quotation. Used once there is serious intent to buy.

Purchase Order (PO) — The buyer's formal confirmation. It says: "We accept your terms, we want this quantity, ship it."

The typical sequence looks like this:

Buyer inquiry → Quotation → Proforma Invoice → Purchase Order → Delivery → Commercial Invoice → Payment

What Must a Proforma Invoice Include?

A proforma invoice that is missing key fields will cause delays at customs, problems with banks, or disputes with buyers. Every proforma invoice must include:

Mandatory Fields

Header

• The words "PROFORMA INVOICE" clearly at the top (not just "Invoice")
• A unique proforma number (e.g., PI-2026-001)
• Date of issue
• Validity period (e.g., "This proforma is valid for 30 days from the date above")

Seller Details

• Legal business name (exactly as registered)
• Full address
• GSTIN / Tax ID / VAT number (where applicable)
• Contact email and phone
• Bank details (if requesting advance payment)

Buyer Details

• Buyer's full legal name
• Complete shipping and billing address
• Contact person name and email

Line Items

• Detailed description of each product or service
• HSN / SAC code (mandatory in India under GST)
• Quantity and unit of measurement
• Unit price
• Total price per line item
• Currency (INR, USD, EUR — always specify)

Financials

• Subtotal
• Applicable taxes (GST breakdown: CGST/SGST/IGST, or VAT for international)
• Shipping and freight charges
• Discounts (if any)
• Grand Total

Terms

• Payment terms (e.g., 30% advance, 70% before dispatch)
• Incoterms for exports (FOB, CIF, EXW, etc.)
• Estimated delivery date
• Place of delivery

Disclaimer

• "This is a Proforma Invoice and not a Tax Invoice. It carries no legal or tax validity."

Proforma Invoice Format — Example Layout

Here is what a properly structured proforma invoice looks like:

How to Create a Proforma Invoice — Step by Step

Step 1: Choose Your Template

Start with a pre-built template. Download the free Excel or PDF template linked at the end of this article. It includes GST fields, HSN code columns, and automatic totals.

Step 2: Add Seller and Buyer Details

Fill in your legal business name exactly as it appears on your PAN or GST registration. For the buyer, include their full address with the country — especially important for export transactions.

Step 3: Assign a Unique Proforma Number

Use a consistent numbering system: PI-2026-001, PI-2026-002, and so on. This makes tracking and follow-up far easier.

Step 4: List All Line Items Clearly

Describe each product or service specifically — not generically. "Handmade cotton rugs, 3x5 ft, red and blue pattern" is correct. "Rugs" is not. Vague descriptions cause customs delays.

Step 5: Include HSN / SAC Codes

In India, every product under GST has an HSN code and every service has a SAC code. Include these for every line item. They are mandatory in commercial invoices and strongly recommended in proforma invoices.

Step 6: Calculate Taxes and Total

Add GST breakdown (CGST + SGST for domestic, IGST for interstate or export). If you are exporting under LUT (zero-rated supply), state: "Export under LUT — Zero-rated supply. No GST applicable."

Step 7: Add Payment Terms and Validity

Never leave these out. State the exact payment split, accepted payment methods, and how many days the proforma is valid.

Step 8: Add the Disclaimer

"This document is a Proforma Invoice and not a Tax Invoice. It has no legal or tax validity and does not represent a demand for payment."

Step 9: Sign and Send as PDF

Have an authorized signatory sign it. Add your company stamp if applicable. Always send as a locked PDF — not an editable Word file.

Complete Guide: Proforma Invoice and GST in India (2026)

What GST Law Says About Proforma Invoices

The CGST Act 2017 does not mention proforma invoices anywhere. This means:

• A proforma invoice is not a prescribed document under GST
• It creates no tax liability
• It cannot be used to claim Input Tax Credit
• It does not need to be reported in GSTR-1 or GSTR-3B

Source: Section 31 of CGST Act 2017 defines what constitutes a tax invoice — a proforma invoice does not meet these conditions.

When GST Becomes Applicable on Proforma-Related Transactions

Scenario 1: Advance Payment Received If a buyer pays advance based on your proforma invoice, GST liability is triggered on that advance amount.

What you must do:
1. Issue a Receipt Voucher for the advance
2. Calculate GST on advance amount
3. Report it in GSTR-1 under advance received
4. Adjust this when final tax invoice is issued

Scenario 2: Export Under LUT If you are a registered exporter with a Letter of Undertaking (LUT), mention this on your proforma: This is a zero-rated supply under GST. Export under LUT. No GST applicable.

Scenario 3: SEZ Supplies For supplies to Special Economic Zones, proforma invoices must clearly mention: Supply to SEZ — Zero Rated Supply under IGST Act 2017

GST Checklist for Proforma Invoice

• Do NOT show GST as a separate line item (it is not a tax invoice)
• Do mention your GSTIN on the proforma (it establishes your credibility)
• Do NOT use proforma invoice number in your GST return filing
• Do issue a proper tax invoice when supply actually happens
• Do NOT let buyers claim ITC on proforma (it is not valid for ITC)
• Do issue Receipt Voucher if advance payment received against proforma

Proforma Invoice vs Receipt Voucher vs Tax Invoice — Under GST

For Composition Scheme Dealers

If your business is registered under GST Composition Scheme, your proforma invoice must mention:

Composition Taxable Person — Not Eligible to Collect Tax on Supplies

This is mandatory even on proforma invoices to avoid confusion.

Common Mistakes That Kill Deals and Cause Customs Delays

Mistake 1: Writing "Invoice" instead of "Proforma Invoice" This single error can create legal confusion. A buyer may treat it as a payment demand. A customs officer may treat it as a commercial invoice. Always clearly label it.

Mistake 2: No validity period Without a validity date, a buyer can come back six months later expecting the same price. Add "Valid for 30 days" on every proforma.

Mistake 3: Vague product descriptions "Electronics" or "Goods" will get flagged at customs. Use full product names, specifications, HSN codes, and country of origin.

Mistake 4: Proforma and commercial invoice don't match If your proforma says 200 units at $45 and your commercial invoice says 200 units at $46, the bank may reject the LC payment. Keep them consistent.

Mistake 5: Missing Incoterms on export proformas FOB? CIF? EXW? If you don't specify who pays for freight and insurance, you will have a dispute when the bill arrives. Check the official ICC Incoterms guide for definitions.

Mistake 6: Using it as a tax invoice A proforma cannot replace a tax invoice for GST compliance. Once the supply happens, issue a proper tax invoice.

Mistake 7: Wrong Currency Mention Many Indian exporters write the amount in INR but forget to mention the exchange rate agreed upon with the buyer.

Mistake 8: Not Mentioning Port of Loading Customs authorities in both countries need to  know exactly where goods are being shipped from.

Wrong way: Goods will be shipped from India
Right way: Port of Loading: Nhava Sheva (JNPT), Mumbai, India

Mistake 9: Sending Editable Word File If you send a proforma invoice as a .doc or .docx file, the buyer can edit the amounts before showing it to their bank for LC.

Fix: Always convert to PDF and lock it before sending.

Mistake 10: No Bank Details on Advance Payment Proformas If you are asking for advance payment through a proforma invoice, your bank details must be clearly mentioned.

Include:
- Bank Name
- Account Number  
- IFSC Code (for domestic)
- SWIFT Code (for international)
- Branch Address

Mistake 11: Copying Previous Proforma Without Updating Date A very common mistake in small businesses — they reuse old proforma invoices and forget to update the date and proforma number.

This creates serious problems when the buyer submits it to their bank or customs.

Fix: Use accounting software like ZYNO Books that auto-generates unique proforma numbers and dates.

Mistake 12: No Disclaimer Line Without a disclaimer, tax authorities or buyers may treat your proforma invoice as a tax invoice.

Always add this line at the bottom: This is a Proforma Invoice only. It is not a Tax Invoice under GST law and creates no legal obligation to pay. No Input Tax Credit can be claimed on this document.

Mistake 13: Proforma Does Not Match LC Terms When a buyer opens a Letter of Credit based on your proforma, every detail must match exactly — product description, quantity, unit price, incoterms, port of loading.

Even a one-word difference can cause the bank to reject the LC payment.

Fix: Before sending the proforma, confirm every detail with your buyer verbally first.

When Should You Send a Proforma Invoice?

Send a proforma invoice when:

• A buyer asks for a formal price quote in invoice format
• A buyer needs to apply for an import license
• A buyer's bank requires documentation to open a Letter of Credit
• You need advance payment before starting production or shipping
• A government client or large company needs internal purchase approval
• Customs authorities need pre-shipment valuation

Do not send a proforma invoice when:

• The sale is complete and goods have already been delivered (send a tax invoice instead)
• You want to record the sale in your accounts (use a commercial invoice)
• The buyer needs a document for GST input credit (use a tax invoice)

Free Proforma Invoice Template — Download

???? Download Proforma Invoice Template — Excel (GST-ready with HSN fields)
???? Download Proforma Invoice Template — Word (GST-ready with HSN fields)

The templates include:

• Pre-filled GST calculation formulas
• HSN / SAC code column
• CGST / SGST / IGST split
• "PROFORMA INVOICE" watermark / disclaimer
• Export-ready Incoterms field
• Validity date reminder

Frequently Asked Questions

What is a proforma invoice used for?
A proforma invoice is used to give buyers a formal preview of a transaction before it is completed. Common uses include opening letters of credit with banks, applying for import licenses, getting internal purchase approvals, and securing advance payments from buyers.

Is a proforma invoice legally binding?
No. A proforma invoice is not legally binding. It does not create a legal obligation to pay. Once both parties formally accept the proforma and goods or services are delivered, a commercial or tax invoice is issued — and that is the legally binding document.

What is the difference between a proforma invoice and a commercial invoice?
A proforma invoice is issued before the sale is finalized. A commercial invoice is issued after goods are shipped or services are delivered. The commercial invoice is legally binding and demands payment. The proforma invoice is an advance estimate — not a demand for payment and not recorded in accounts.

What is the difference between a proforma invoice and a quotation?
A quotation is an informal price estimate. A proforma invoice is a formal document in invoice format. The proforma is more detailed, follows a standard format, and is used in formal trade processes like LC applications and customs documentation. A quotation is usually just the starting point of a negotiation.

Does GST apply on a proforma invoice in India?
No. Under Indian GST law, a proforma invoice is not a taxable document. It cannot be used to claim input tax credit and does not need to be reported in GST returns. GST applies only when the actual supply of goods or services takes place and a proper tax invoice is issued.

Can I collect advance payment against a proforma invoice?
Yes, you can request advance payment using a proforma invoice. However, once advance payment is received, GST may apply on that advance (depending on the nature of supply). In such cases, also issue a Receipt Voucher for the advance and convert the proforma into a proper tax invoice when supply happens.

What comes first — a PO or a proforma invoice?
The proforma invoice comes first. You send it to the buyer after initial negotiations. The buyer then reviews it, gets internal approvals, and issues a Purchase Order (PO) as their formal confirmation. Then you proceed with supply.

Is a proforma invoice mandatory for exports from India?
It is not legally mandatory under FEMA or DGFT rules, but it is practically essential. Foreign buyers need it to arrange Letters of Credit, import permits, and customs documentation. Most Indian exporters treat it as the first step in every export transaction.

How long is a proforma invoice valid?
Typically 30 days, but you can set any validity period. Always state the validity clearly on the document. After it expires, issue a revised proforma if prices or terms have changed.

How do I number proforma invoices?
Use a consistent prefix and sequence — for example, PI-2026-001, PI-2026-002. Use a different prefix from your regular invoices (e.g., INV- for tax invoices, PI- for proforma) to avoid confusion.

Can a proforma invoice be cancelled?
Yes. A proforma invoice can be cancelled at any time before the buyer accepts it or makes payment. Since it is not a legal document, no formal cancellation process is required. Simply inform the buyer in writing that the proforma is withdrawn.

What happens if prices change after sending a proforma invoice?
If prices change before the buyer places an order, you must send a revised proforma invoice with the updated prices and a new validity date. Never let an expired or outdated proforma be used for payment.

Can two proforma invoices be issued for the same order?
Yes. If the order is split into multiple shipments, a separate proforma invoice can be issued for each shipment. Use sequential numbering like PI-2026-001A and PI-2026-001B to link them.

Is a digital signature valid on a proforma invoice?
Yes. Under the Information Technology Act 2000, a digital signature is legally valid in India. For international transactions, check the buyer's country requirements.

Does a proforma invoice need to be on letterhead?
There is no legal requirement. However, using your official company letterhead with logo, address, and GSTIN makes the document more professional and reduces the chance of rejection by banks or customs authorities.

Can a service business use a proforma invoice?
Yes. Service businesses use proforma invoices frequently — especially for IT projects, consulting, and creative services — to get advance payment approval before starting work. Use SAC codes instead of HSN codes for services.

What is the difference between proforma invoice and advance invoice?
A proforma invoice is sent before any payment commitment. An advance invoice is sent when you have already agreed on terms and are specifically requesting advance payment. In GST terms, an advance invoice triggers GST liability while a proforma invoice does not.

How many copies of proforma invoice should be made?
For domestic transactions, one copy is sufficient. For export transactions, prepare at least three copies:
- One for buyer
- One for customs/shipping agent  
- One for your own records

Summary

A proforma invoice is one of the most practical documents in business — especially for anyone dealing with exports, imports, large clients, or advance payments. It builds trust by making terms clear before anything is committed. It speeds up customs, enables financing, and prevents disputes.

Here is what to remember:

• Issue it before the sale, not after
• Label it clearly as "Proforma Invoice" — not just "Invoice"
• Include HSN codes, currency, Incoterms, validity, and a disclaimer
• Never use it as a substitute for a tax invoice
• Make sure your proforma and final commercial invoice match exactly

Download the free template above, adapt it to your business, and use it every time you start a new deal — domestic or international.